Upgrading your DB2® database product to a new release might require upgrading your database applications, routines, tools, and scripts if changes in new release impacts them.
Upgrading your applications and routines involves the following actions:
Test whether your applications and routines perform as expected in a DB2 Version 10.5 testing environment. You do not need to upgrade your applications and routines if they run successfully.
Test your applications and routines in a DB2 Version 10.5 testing environment.
Verify that your applications and routines perform as expected in your DB2 Version 10.5 production environment before deploying them.
If your applications and routines use any functionality that is deprecated in DB2 Version 10.5, you must remove the use of this functionality from your application code. The deprecated functionality will not be supported in DB2 Version 10.5 and may be discontinued in a future release.
Also, you must consider adopting new functionality available in DB2 Version 10.5 to enhance functionality and improve performance.